City University of Hong Kong Dept. of Physics & Materials Science AP2104 Mechanics of Solids Laboratory Manual Experiment 1 Pure Bending of a Beam Experiment 2 Torsional Deformations Experiment 3 Yield Criteria for Ductile Materials under Plane Stresses Experiment 1 Pure Bending of a Beam Objective 1. To examine the stresses at various positions of the beam under a constant load of pure bending. 2. To determine the curvature of deflection of the beam. Introduction
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Part 2: Safe work with large inductances 1. One of the main hazards of using inductances is electrical energy stored in the magnetic field. If a circuit containing an inductance is interrupted then the stored energy can release through air (forming an arc). This can destroy a switch contact‚ burn fingers‚ create other damage. In the circuit of Figure 1‚ show how to mitigate the risk (pay attention to polarity!). We give the elements in this circuit some simple values for the purpose of
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http://www.phys.unsw.edu.au/ASISTM/workmodule.html [pic] Work‚ energy‚ power and force. A good way to get a feeling for work and power is to produce some yourself. In this simple exercise you will measure how much work you do and calculate how powerful you are. Safety You will need some stairs that you can safely run up‚ preferable more than one floor. Normally‚ you shouldn’t run on stairs. So you should • not run up stairs if you are sick or have a medical problem • check that your teacher
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Physics Waves Lab SL Introduction: This lab will investigate the properties of mechanical waves such as a longitudinal wave‚ focusing on the question: Does a change in the frequency of a wave result in a significant and convincing change in the speed of the wave? Hypothesis: Changing the frequency of the wave will not result in a change in speed because the wavelength will change proportionally as in theory. Student Designed Investigation Procedure/ Planning Procedure: 1. Three
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Introduction Cellular respiration provides energy to all living organisms by collecting energy from food molecules. The cell then rearranges complex molecules to simpler molecules and uses that energy to make a molecule that stores energy called adenosine triphosphate also known as ATP. Cellular respiration can occur with or without oxygen. When it occurs without oxygen‚ it is called anaerobic respiration. There are very few organisms that can get its energy by anaerobic respiration because much of
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Organic Chemistry II Lab 9 Fermentation of a Carbohydrate: Ethanol from Sucrose * Introduction Ethanol is one of the oldest alcohols and also the least toxic one. Industrially‚ ethanol is made most economically by hydration of ethylene. However‚ ethanol that is intended for human consumption must‚ by law‚ be prepared by fermentation. By either method‚ ethanol‚ of course‚ has the same formula‚ structure‚ and properties. The fermentation takes place with the assistance of enzymes from yeast
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milliamps equals one Ampere. Move the potential (volts) and resistance (ohms) sliders and observe the current (amps) As voltage increases‚ current _increases_. As resistance increases‚ current ___decreases___. Fill out the tables below and check your work in the simulation. ( ½ pt each ) Remember‚ the simulation shows milliamps. You should show Amperes V = I * R 8.0 V .010A 800 Ω 2.0 V .044 A 45.45Ω 2.5V .0058 A 430 Ω 6.9V .069 A 100 Ω 6.4 V .0213A 300 Ω Conclusion Questions:
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DP Physics IA Thermal physics: Specific Heat Capacity of Metals Introduction: In this experiment we are going to measure the specific heat capacity of a unknown metal. To measure the specific heat capacity we will heat up the metal to certain temperature and release the metal in beaker filled with water. By knowing the mass and temperature of water filled in beaker‚ we will be able to calculate the specific capacity of unknown metal by change in temperature of beaker willed
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bacteria(LAB)‚ a bacteria that can be found in the production of cheese‚ its stress gene was investigated in the experiment by using various biochemical and genetic techniques to identify and extract. The characterisation of the strain illustrates how identification of strains differ using different methods‚ such as gram stain and 16s rRNA screening. After the characterisation‚ the stress gene isolation assist the further understanding of the gene on LAB be giving different stress in future work.
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ultraviolet light by a molecule transfers all the energy of the photon to one molecule. This is sufficient energy to excite one bonding or non-bonding electron from its stable ground-state orbital arrangement to an Excited State orbital. The electrons then reorganize their bonding to stabilize the excited state. In some instances bonds get longer or shorter‚ in other instances a covalent bond may be broken. These changes depend on the energy of the light absorbed by the molecule (which is proportional
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